xxxxxxxxxx
const downloadQR = () => {
const canvas = document.getElementById("123456");
const pngUrl = canvas
.toDataURL("image/png")
.replace("image/png", "image/octet-stream");
let downloadLink = document.createElement("a");
downloadLink.href = pngUrl;
downloadLink.download = "123456.png";
document.body.appendChild(downloadLink);
downloadLink.click();
document.body.removeChild(downloadLink);
};